I'm flying to Athens, in 5 weeks. I'm going to do a 340km route from Athens to Patras and back, on the both sides of Ionian Sea.
Right now my max achievable distance is 200km (trekking bike, avg 24km/h). Two weeks ago I began doing gym twice a week, spinning twice a week, and long (100-200km) ride during weekends.
Are those 5 weeks enough to train myself for such distance? (with decent avg speed)
Also, is this route a good choice for late October? I dont want huge cold wind blowing on my face the whole day.